EMPI. 18-1075-0. Adjustable rear spring plates. Pair. For IRS ( independent rear suspension ) vehicles. For 26-9/16" torsion bars. 6-1/8" collar. Replaces SINGLE style spring plates. Measure your torsion bars.
Larger 2" outer bushings required 16-5132-0
Most 72-79 Beetles have this length of torsion bars.